Initial import of LAMBDA reduction code from RTKLIB for testing.
added files for UD kalman filter
switched to using flat arrays
added observation updating
using KF struct in pred forward
using kf struct throughout
added transition matrix
added C D mtx
added e mtx
added C DE mtx
defined some new constants
added obs_mtx
most KF generating functions done
added least sq initializer and kf constructor
merge with fergus master
added files to manage KF
using single diff structs
Merge branch 'lapack' into kalman
Remove cmake calls to find system BLAS/LAPACK, using our own version now
working towards KF handling funs